Hyper-V VMs Freezing

The drivers were installed a day after the last failure, which was the first since two weeks, when the Hosts got the newest Windows Updates. So for me, it doesnt seem like the driver is affecting this issue at all.
Both nodes are exactly the same, running with two XEON CPUs and 128GB RAM each. Memory is used for max 50%, CPU nearly gets nearly never over 5%. So the nodes aren't under heavy load.
What I forgot to say: The crashes happens mostly at night, this is also when we run our backups. The last crash was during work time, where we manually started a backup job a few minutes prior.

Since we got our new Servers (HP DL380P Gen8) with Server 2012 R2 in an Hyper-V HA-Cluster, some of our VMs freeze. For Storage we use HPs VSA, and Backups are done with Veeam.
It happens on both of our Hosts, but not at the same time. The freezing affects nearly every time all Windows VMs, but sometimes the Linux VMs are still reachable. Sometimes the whole Hyper-V Host is unreachable and if we try to move the Guests to the other Host, the process simply "failes". After the Host is rebooted everything is normal again.In the logs, we can see the following events for example
- 1129 from FailoverClustering (Network is partitioned)
- 1127 from FailoverClustering (Error in ClusterNetworkInterface)A few weeks ago, it happened every night, until we installed Windows Updates on the Hosts. After that it was gone for a few weeks.A few weeks...
This topic first appeared in the Spiceworks Community

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DPM 2012 R2 Backup job FAILED for some Hyper-v VMs and Some Hyper-v VMs are not appearing in the DPM

DPM 2012 R2 Backup job FAILED for some Hyper-v VMs
DPM encountered a retryable VSS error. (ID 30112 Details: VssError:The writer experienced a transient error. If the backup process is retried,
the error may not reoccur.
(0x800423F3))
All the vss Writers are in stable state
Also Some Hyper-v VMs are not appearing in the DPM 2012 R2 Console When I try to create the Protection Group please note that they are not part of cluster.
Host is 2012 R2 and The VM is also 2012 R2.

Hi,
What update rollup are you running on the DPM 2012 R2 server ? DPM 2012 R2 UR5 introduced a new refresh feature that will re-enumerate data sources on an individual protected server.
Check for VSS errors inside the guests that are having problems being backed up.
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Regards, Mike J. [MSFT]
This posting is provided "AS IS" with no warranties, and confers no rights.

Oracle RAC on 2 Microsoft hyper-v VMs

Is it possible to setup a test Oracle RAC env on 2 Microsoft Hyper-v VMs like you can using VMware?
I have setup a VMWare test Oracle RAC env following http://www.oracle-base.com/articles/10g/OracleDB10gR2RACInstallationOnCentos4UsingVMware.php and was hoping this could also be done with Microsoft Hyper-V.
Thanks,
Steve

I would speculate that this certification matrix mainly applies to a situation of installing Oracle RAC on Hyper-V VMs running on separate physical hosts using some sort of "true" shared disk. At this time, I am mainly trying to investigate the possibility of running a "test" low-cost Oracle RAC on a single Hyper-V physical host running 2 Linux VMs. If possible the shared disk wouild just be some sort of pseudo disk setup in Hyper-V shared between the VMs running on the physical hosts. I know this is possible with VMWare. I believe it is also possible with OracleVM (but have not tried OracleVM myself). The place I am currently working is using Hyper-V to run their virtual hosts and I was hoping that the "cheap" Oracle RAC Test environment using VMs could also be implemented with Hyper-V.
Thanks,
Steve

Hyper-V 2012 VMs freeze on large file transfers

I have a small non-clustered Hyper-V Server setup as follows:
HP ML350p Gen8 Server, 6 core E5-2620 CPU and 32GB Memory running Server 2012 (full GUI) with the Hyper-V role enabled.
The Server has 8 disks, 1 pair of RAID1 15k disks for the Server 2012/Hyper-V OS, and 3 pairs of RAID1 10K disks for 3 VMs (ie each VM has its own pair of RAID 1 disks). The NICs in the Server are 4 x gigabit ports on an internal
331i card and 4 x gigabit on an external 331T card. The Hyper-V Server is not running anything other than the Hyper-V role, the LogMeIn client and Symantec SEP SBE 2013 (with recommended Hyper-V exclusions in place) and
the VMs are a Domain Controller, a SQL Server and a File Server. Currently all VMs have their own single 1GB NIC connection on the 331T card, all VMs have a single IP address and are on the same subnet, no VLANs are used.
I have applied what hot fixes I can from a TechNet article that recommended how to setup Hyper-V.
Initially I had a problem with NIC latency during pings, which we traced to being due to the ML350 Gen8 Server's NICs not liking VMQ enabled. When disabled all looked fine, but we had not yet tried to use the Server in production.
Recently (getting ready to go in to Production use) we have noticed when transferring a 3.5GB ISO of SQL media to a file share on one of the VMs from a desktop PC that this causes the VM to lock up. The file copy will still complete but the screen freezes
when accessed via Hyper-V manager or remotely via LogMeIn and sometimes the LogMeIn remote session is dropped too. If you cancel the file copy the console is immediately responsive again.
Since we built the server a while back, HP had subsequently released an updated NIC driver which we installed and it seems to have fixed the VMQ issue, but with or without VMQ enabled we seem to experience the lockups as soon as we transfer medium to large
size files. The issues were there before and after we upgraded the NIC driver, we were hoping it would address the issue, but it didn't. These servers are very lightly loaded and the problem occurs even on the SQL Server VM with the SQL service disabled
(ie the server has hardly anything running at all and the console freezes with a single user performing a single file copy).
We have 3 VMs on the Server, 2 are running Server 2012 and seem to be more affected, the VM running Server 2008 R2 seems less affected. VM to VM transfers seem to be working better (ie slows down slightly but no lock ups), it is only during external network
transfers. Also the faster the transfer speed is, the worse the issue becomes. If the file is copied to a share on the Hyper-V Host the issue does not occur, only transfers to the VMs.
Does anyone have any idea what might be the issue here? I saw a hotfix for 2008 for a similar issue but can't seem to find anything for Server 2012.

I think we have tried almost every combination of disabling Large Send Offload, TCP offload, IP SEC Offloading, VMQ and Receive Side Scaling possible - in the various places there are - although I will be quite honest - as there are 3 places to do this
for each Server (the related physical and virtual NICs on the HV Server, and also the NIC in the VM) it is possible we may have missed an iteration...
During our testing we have noticed that the symptoms of the problem gets worse the higher the transfer speed is. For example if you transfer to the VM from a desktop with a 100Mbs NIC, there will be subtle lag and a transfer speed of say 10 or so KBs ,
if you use a device with a 1Gbs NIC, you on average achieve 50-70 KBs transfer speeds and the higher the number, the worse the GUI / Server locks up (although the transfer completes just fine).
We also tried throttling the bandwidth via the 2012 GUI - to see if that helped, but none of the changes we made seemed to work, and we did not have time to try the powershell way of doing this.
We did replace one of the VM's NIC with a legacy one as part of our testing today, and now data transfers to the VM from a PC with a 1Gbs NIC run slower at around 30-35 KBs and the are no noticeable GUI freezes, although during the large transfer
it looks like 1 in every 30-40 packets is dropped in a continual ping that runs during the transfer period.
We have done a lot of cable replacing today (out of diligence) but there seems to be no noticeable issue. We also tried and older NC380T dual port NIC we had available and used the standard driver Windows offered instead of an HP one, but the problem
was identical no matter which NIC we used.

RDP from internet not working in Hyper-v VMs

Hello .
Sorry for my english .I hope to explain clearly my problem .
I 've Hyper-v on Windows 2008 server r2 . I've 3 Virtual networks ( External , Private and internal ) .
In my VMs there are two domains . The first one is bound with internal Vn and the second is bound with private Vn. My Host RRAS is configured to switch inbound connection RDP (3389) to a second RRAS (Virtual machine bound with private network) . Last
RRAS does port forwarding correctly to the machine for RDP connection ( port 3389) request .
RDP works only from host and VMs but not from internet in private vn.
RDP from internet connects but when try to configure session disconnects . Any ideas ?
Netstat says "SYN-RECEIVED" then disconnects .
All other services work fine (http mapped between RRAS host and RRAS vm i) and RDP works in private virtual network from internet . I think the problem is nat over nat for port 3389 in internet connection . I've tried to disable firewall but
not works .
Thanks

Also add firewall exception "from" any or specific ip "inbound" "to" whichever destination.
To truly test, you ca disable firewall, if it allows rdp session, then you know it is something with firewall.
Remember sometimes antivirus software includes firewall., and in the case of home routers, they have built-in firewall, and Windows also has firewall, so you must be sure to check ALL possible locations of firewall blocking and dropping (even server-to-server).
Basically you would be allowing inbound from your router, NATted through (or routed through) your network, to the destination or allowing inbound from server to server. Also
double check that your server NICs are not having any additional 2nd DHCP interfaces, if so, disable the secondary DHCP NIC and test again. And do:
traceroute
From Internet to the server having the issue and from server to server and it may uncover more details of where things are getting dropped.
I have heard also some ISPs may also try to block inbound RDP or 3389, so be sure and verify that as well.
Please mark as answer if I helped solve your issue. Thank you.
tnjman

Hyper-V VMs not showing at remote locations

My main headquarters is in Ohio. When I log into our Hyper-V host server, I can open the Hyper-V manager and see all of my virtual machines. The Ohio VLAN range is 192.168.120.***
When I remote desktop into our Georgia or Mexico Hyper-V host servers, I don't any VMs in the Hyper-V manager, but I can remote desktop to the individual VM itself.
Also, the D: on each of my hosts is showing empty, even though that's where the virtual disks are stored.
Please help!

Hi Crono7114,
Agree with others .
In addition , if the remote server installed ABE and the remote user has no permission to access folers in D: , it will dispaly nothing .
Please check that .
Best Regards
Elton Ji
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are trying to better understand customer views on social support experience, so your participation in this
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Using second wireless network for client Hyper-V VMs

Hello all,
I have a question concerning client Hyper-V on Win8.1 Pro Preview and wirelessly connecting only the VMs. I'm a student at a university and the university wired Ethernet network only allows 2 devices to be registered per student. So for me, those 2 would
be the host OS and my Xbox, which leaves no room for any of my VMs. I need a way to connect my VMs to the wireless network (which has no such limitations) mostly for programming assignments using Linux.
I'm thinking of buying a wireless NIC for my desktop and using that as a second external switch that the VMs will use for connectivity. The host will use the first external switch that currently exists. However, I'm not sure how I can keep the host on the
wired LAN while also installing a wireless NIC only for the VMs. Do I install the NIC, make it an external switch without host access, then join the network? Or do I join the network first then set it up as a virtual switch? Can client versions of Windows
handle multiple simultaneous NICs?
Also, would the host even need an external switch in this case? I have one since I set up the VMs at home where all machines can use the wired NIC.

Ahh, that's right. check out this post. This should explain the problem and offer a workable solution.
Hi,
I remember some articles mentioned Windows Hyper-V does not allow you to bind a wireless network adapter to a virtual machine.
Since the virtual switch in Hyper-V is a “layer-2 switch,” which means that it switches (i.e. determines the route a certain Ethernet packet takes) using the MAC addresses that uniquely identify each (physical and virtual) network adapter card. The MAC address
of the source and destination machines are sent in each Ethernet packet and a layer-2 switch uses this to determine where it should send the incoming packet. An external virtual switch is connected to the external world through the physical NIC. Ethernet packets
from a VM destined for a machine in the external world are sent out through this physical NIC. This means that the physical NIC must be able to carry the traffic from all the VMs connected to this virtual switch, thus implying that the packets flowing through
the physical NIC will contain multiple MAC addresses (one for each VM’s virtual NIC). This is supported on wired physical NICs (by putting the NIC in promiscuous mode), but not supported on wireless NICs since the wireless channel established by the WiFi NIC
and its access point only allows Ethernet packets with the WiFi NIC’s MAC address and nothing else. In other words, Hyper-V couldn’t use WiFi NICs for an external switch if we continued to use the current virtual switch architecture.
To work around this limitation, you can use Microsoft Bridging solution. Create an Internal network, name it “External”, system will create a Virtual Network adapter for it. Create Network Bridge between your WiFi NIC and the Virtual External Network adapter.
Assign External network for your VMs, so they have internet connection.
For more information please refer to following MS articles:
Bringing Hyper-V to “Windows 8”
http://blogs.msdn.com/b/b8/archive/2011/09/07/bringing-hyper-v-to-windows-8.aspx
Hyper-V: How to Run Hyper-V on a Laptop
http://social.technet.microsoft.com/wiki/contents/articles/185.hyper-v-how-to-run-hyper-v-on-a-laptop-en-us.aspx
Configuring Virtual Networks
http://technet.microsoft.com/en-us/library/cc816585(v=WS.10).aspx
Hope this helps!
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Remember to select 'Mark as Answer' for any reply that provided a solution

Hyper-V VMs memory utilization

Hi,
Please let me know the WMI class (query) to check the memory utilization for all the VMs under the Hyper-V host.
Thanks & Regards,
Raamesh Keerthi N J

Hi ,
I would recommend you to use powershell command " Get-vm " to get the memory usage of the VM .
As for using WMI to get the VM's memory usage(I am assuming you are using server2012r2 ) , please try the command below :
$RequestInfo = 1,103,112
$VmInfo = Get-WmiObject -namespace root\virtualization\v2 -class msvm_virtualsystemmanagementservice
$VmInfo.getsummaryinformation($null,$RequestInfo).summaryinformation
For the WMI class syntax please refer to following article :
http://blogs.msdn.com/b/virtual_pc_guy/archive/2013/04/29/powershell-script-to-tell-you-if-you-need-to-update-your-integration-services.aspx
If you have further more question about WMI , please post it here :
http://social.technet.microsoft.com/Forums/en-us/home?forum=ITCG&filter=alltypes&sort=lastpostdesc
Best Regards
Elton Ji
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
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Licensing on Hyper-v VMs

Hi,
Is this correct? Using Windows 2008 R2 Enterprise Hyper-v with GUI we can run 4 "free" any server editions VMs (Windows 2008/2012 R2 Ent/Std).
Using Windows 2012 R2 Hyper-v with GUI, how many free VMs (Windows 2012 R2 Ent/Std) we can run?
Thanks

Hi jori5,
"Windows Server 2008 R2 Enterprise – A customer licensed with Windows Server 2008 R2 Enterprise may run one instance of the server software in the physical operating system environment (POSE) and up to four instances of the server software
in the virtual operating system environment (VOSE). If the customer is running 4 instances in the VOSE then the instance running in the POSE can only be used to manage the 4 instances of the OS running in the VOSE. "
http://www.microsoft.com/windowsserver2008/tr/tr/licensing-R2.aspx
Note : It is not supported to install server2012R2 as a guest VM on 2008R2 hyper-v .
Please refer to the supported guest OS list :
http://technet.microsoft.com/library/cc794868(WS.10).aspx
"Using Windows 2012 R2 Hyper-v with GUI, how many free VMs (Windows 2012 R2 Ent/Std) we can run?"
There is no 2012/R2 with Ent edition , please refer to following link:
http://blogs.msdn.com/b/robmar/archive/2014/02/10/windows-server-2012-r2-products-and-editions-comparison.aspx
"Q: What is the difference between Windows Server 2012 R2 Standard edition and Windows Server 2012 R2 Datacenter edition?
A: Both Standard and Datacenter editions provide the same set of features; the differentiator is the number of Virtual Operating System Environments (VOSE). A Standard edition license entitles up to two VOSEs on up to two processors (subject to the VOSE
use rights outlined in the Product Use Rights document for Volume Licensing or End User License Agreement for other channels). A Datacenter edition license entitles an unlimited number of VOSEs on up to two processors. "
http://www.microsoft.com/licensing/about-licensing/windowsserver2012-R2.aspx#tab=4
Also:
http://download.microsoft.com/download/F/3/9/F39124F7-0177-463C-8A08-582463F96C9D/Windows_Server_2012_R2_Licensing_Datasheet.pdf
For lisence issue you may contact MS activation center :
http://www.microsoft.com/licensing/existing-customers/activation-centers.aspx
Best Regards
Elton Ji
We
are trying to better understand customer views on social support experience, so your participation in this
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Pre-install HYPER-V VMs, then Move to Production Server - Questions

Hi All,
I am currently taking over IT Admin duties for a new client, and will be downscaling their bloated 20 server environment to a 5 server Hyper-V environment (about 4 VMs per server). It will be a complicated, and rather time consuming/time sensitive
process, given that as soon as I am handed the Admin passwords, I am expected to transition the entire network to a new DC server VM, a seperate Exchange VM, and seperate DirectAccess VM over a 3 day weekend.
I was thinking about getting started on this early, and was planning on setting up and configuring the DC and Exchange Server VMs on an old spare Dell server I have with my licensed copy of Server Standard 2012 R2 with Hyper V role enabled. Then,
when it comes time to transition them over the 3 day weekend, it would be a simple matter of copying the HYPER-V Folder (containing Virtual Hard Disks & Virtual Machines folders) from the spare Dell Server to a portable USB drive that will be brought to
client's site. Then at client's site, I would erase and install Server Standard 2012 R2 Hyper V on one of the client's 20 servers (probably the best of the bunch), and then copy the HYPER-V folder containing the DC & Exchange server from
the portable USB drive to it. Then I would simply import the DC and Exchange VMs via the Hyper V Manager.
My two questions are as follows:
1) Just to be sure, given the DC and Exchange VMs are virtualized, it will make no difference to transitioning from an old crappy Dell server to a rather new modern Dell server. I know performance will be better on the new server, but there will be
no complications with the VM migration (aside from allocating more Cores, Memory, & Virtual NIC)...yes?
2) The client's Windows Server licenses - client is currently under an Enterprise Subscription license with Microsoft (either Open Value or Open Business - dont know yet). For the time being (before the 3 day transition), can I get away with using a 180
day trial editions of Server Standard 2012 R2 and Exchange 2013 to setup and configure the VMs, and then activate the trial editions later using their existing Enterprise Keys? Or will this not work because of some incompatible reason?
There are over 200 users and 300 email accounts, so I would really prefer to configure all this ahead of time if I can, but dont want to find out last minute or on day of migration that my Enterprise Key wont activate because I used the trial editions and
I have to reinstall/reconfigure all over again. Is this possible or is there another, better, recommended way?
Ultimately, I would like to get as much done ahead of time, so that then the major issues on migration day will be data migration (files, folders, and email) and the reinstallation of all 100 workstations (via Windows Deployment Services - yeeah baby!!!).
Does this sound possible? Any advise would be greatly appreciated.

I see only one problem with your plan: Once you promote Windows Server to be a domain controller, you can't change its license key. That means that you won't be able to go from trial to licensed on that one. Since you're talking about transitioning from
a physical DC to a virtualized DC, what I've done in the past is create a temporary virtualized domain controller with a trial key. Then, you can use all the AD tools to decommission and remove the original and then rebuild it from scratch as a virtual machine
with the proper license key later. That lets you re-use its IP -- and, while riskier, even its name -- if you want, although you need to ensure you do an extra thorough job of cleaning out all the remnants of the original first (AD Sites & Services and
ADSIEdit are your friends). Once you're satisfied with the rebuilt DC, you can decomm the temporary DC at your leisure, or keep it for redundancy if they have sufficient licensing. Pay special attention to relocating DNS and DHCP, etc.
Everything else looks sound. Exchange migrations aren't my forte, though.
Eric Siron
Altaro Hyper-V Blog
I am an independent blog contributor, not an Altaro employee. I am solely responsible for the content of my posts.

WMI High CPU Usage on Hyper-V VMs - Related to Data Exchange Integration Service

Title pretty much says it all. Some of my VMs have high CPU and moderate usage going to the WMI Integration Service. I have tracked it down to the Data Exchange Integration Service. If I de-select the service under the VM configuration,
everything works normally. Has anyone seen anything like this yet?
Thanks, TJ

Hi,
Could you provide more information about your environment. for example,What is the exact text of any error messages that you received associated with this problem? The server version of the problem on, when you experience this issue what are you trying
to do, when this problem occurs the system log record information, screenshots is the best information.
More information:
Event Logs
http://technet.microsoft.com/en-us/library/cc722404.aspx
If you are using Server 2008r2 or 2008r2 SP1 please confirm your hardware environment is not same with the following Hotfix described:
Performance decreases in Windows Server 2008 R2 when the Hyper-V role is installed on a computer that uses Intel Westmere or Sandy Bridge processors
http://support.microsoft.com/kb/2517329
Thanks.
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Using Powershell Studio to control Hyper-v VMs and VHDs

Hello everyone! I'm kind of new to Powershell in general, and to Powershell Studio
alltogether.
I'm trying to use Powershell Studio to write a script (with a GUI) that behaves like
this:
Two Windows. On one side there's a window that shows me the list of VMs on my machine.
Once I click on one of them, the window on the right shows me the attached VHDs that VM has.
I can't figure out how to integrate the Get-VM command to display unto a window. I'd
be happy for any help anyone can offer. Cheers and Merry Christmas to all :D

Hi Noamatan,
I also recommend you can consult Sapien expert:
http://www.sapien.com/forums/viewforum.php?f=21
In addition, The Powershell Studio project below is for your reference, which build a drop downlist, then we can display the result by selecting the item in dropdown list:
Building GUI for PowerShell Scripts using PowerShell Studio 2012
If there is anything else regarding this issue, please feel free to post back.
Best Regards,
Anna Wang
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Hyper-V 2012 R2 & Windows 8.1 VMs performance metrics using WMI query

Hi,
I used the following query to fetch the Disk utilization for Hyper-V VMs (non v2 hosts) using its host credential "select ReadBytesPersec,WriteBytesPersec,ReadCount,WriteCount from Win32_PerfRawData_StorageStats_HyperVVirtualStorageDevice" but
for the V2 (Windows 8.1 & Windows 2012 R2) this query is not working this is throwing Invalid class using the namespace "root\cimv2".
Please let me know the exact WMI class for the Disk utilization for V2 hosts VMs.
Regards
Raamesh Keerthi N J

Hi,
In my lab server 2012R2 , I run this command :
get-cimclass | Where-Object { $_.cimclassname -like "*hypervvirtualstoragedevice" } | fl cimclassname
I got two classes :
Win32_PerfFormattedData_Counters_HyperVVirtualStorageDevice
Win32_PerfRawData_Counters_HyperVVirtualStorageDevice
You can try them
Best Regards
Elton Ji
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

HP DL380 G5 Windows Server 2012 R2 Hyper-V

Hello. I have a HP DL380 G5 server & a have a problem. OS installation proceeds normally, the installation takes the role well, but the virtual machines is running weird. When using a network inside a virtual machine (for example, copy of iso file from
the network to virtual machine) CPU inside of the VM at 100%. 50-60% is process System interrupts. All terribly slow, up until the copy end.
I do not know
what to do. Maybe somebody faced with
something similar? Thnx!
HP DL380 G5:
Intel Xeon 5130 2.0 GHz * 2
Ram 32 Gb
Raid Smart Array P400i 512mb + battery
Network Broadcom BCM5708C 1 Gb * 2
Host OS - raid 1
VMs - raid 10
BIOS P56
HP Service Pack for ProLiant 2014.06
Windows Server 2012 R2 + all updates + all newest drivers

Hi Andrey ,
First , I would suggest you to keep the driver up-to-date for physical NIC .
Then check if the integration service was installed .
Allocate more Vcpu for that VM .
If the issue persists please try to disable "offload" for that VM :
http://blog.nicholasrogoff.com/2010/09/24/windows-2008-r2-hyper-vguests-vms-have-slow-performance-change-you-adapter-settings/
Best Regards
Elton JI
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.
Hi Elton!
I have already installed
the latest driver for NICs. From here:
Broadcom
The integration service was installed of course.
I added one additional virtual processor per VM. 2012 R2 works better. In 2018 R2 the task manager
freezes
when copying. Load is 100%..
Disabling"offload"
does not help..

Windows Server 2003 R2 Backup with Hyper-V in DPM

Hello,
I am trying to backup multiple Windows Server 2003 R2 VMs on Hyper-V (Windows Server 2012 R2) with DPM.
When I try to this I get the following errors:
On the Hyper-V Host:
Source: VSS ID:8229
A VSS writer has rejected an event with error 0x800423f4, The writer experienced a non-transient error. If the backup process is retried,
the error is likely to reoccur.
. Changes that the writer made to the writer components while handling the event will not be available to the requester. Check the event log for related events from the application hosting the VSS writer.
Operation:
   PrepareForSnapshot Event
Context:
   Execution Context: Writer
   Writer Class Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
   Writer Name: Microsoft Hyper-V VSS Writer
   Writer Instance ID: {0b5be050-91e2-41a6-9207-414f1291f975}
   Command Line: C:\Windows\system32\vmms.exe
   Process ID: 5312
Source: Hyper-V-VMMS ID: 18014
Checkpoint operation for 'VMName' was cancelled. (Virtual machine ID D605FC49-D379-4C60-A730-485C8E9279DC)
Source: Hyper-V-VMMS ID: 18012
Checkpoint operation for 'VMName' failed. (Virtual machine ID D605FC49-D379-4C60-A730-485C8E9279DC)
Source: Hyper-V-VMMS ID: 10150
Could not create backup checkpoint for virtual machine 'VMName': Element not found. (0x80070490). (Virtual machine ID D605FC49-D379-4C60-A730-485C8E9279DC)
Source: Hyper-V-Worker ID: 3280
'VMName' could not initiate a checkpoint operation: Element not found. (0x80070490). (Virtual machine ID D605FC49-D379-4C60-A730-485C8E9279DC)
Source: Hyper-V-VMMS ID: 16010
The operation failed.
The Output of vssadmin list writers on the Hyper-V Host looks like this:
Writer name: 'Microsoft Hyper-V VSS Writer'
   Writer Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
   Writer Instance Id: {0b5be050-91e2-41a6-9207-414f1291f975}
   State: [8] Failed
   Last error: Non-retryable error
In the Windows Server 2003 R2 VM there are no errors in the eventlog.
Only the information, that VSS is started and stopped after a while.
When I do a Backup with ntbackup of in the VM everything runs fine.
When I create a checkpoint with Hyper-V everything runs fine, too.
The integration services are up to date and get-vmintegrationservice -vmname VMName shows everything is enabled and OK.
On the Hyper-V host there are 13 VMs. 3 of them are running Windows Server 2003 R2 and 2 of them are showing this error. It seems to be no general problem with Windows Server 2003 R2 then.
I tried the backup on a different Hyper-V host with no success.
How can I narrow down the cause of this error?
Thanks.
greets,
torsten

Thank you to everyone in this thread!
After digging through VSS and Hyper-V dead-ends, the solution above worked for me in a W2012 R2 environment.
I only had this problem trying to back up W2012 R2 Hyper-V VMs stored on a CSV, hosted on a W2012 R2 Host Cluster, backing up from a Host node. I could back up from within the guests fine. Both Windows Server Backup and DPM 2012 R2
gave VSS errors on the cluster hosts.
In fact Windows Server Backup complains with 80780189 it won't back up an application with files on a CSV, which is a common cluster configuration. This is an example of another caveat in a minefield of MS caveats buried in fine print which often negates
configurations touted by MS Marketing, things which sound great on a sell sheet, but in practice are impractical or just not production-ready because of these restrictions.
Disabled Backup in Integration Services, performed an offline back up from DPM 2012 R2 (which did briefly affect serving the workloads on the VM), which succeeded, and then re-enabled Backup in Integration Services. DPM then continued to
sync successfully after that for a day. However, this problem returned after a period of heavy DPM backup activity. So I redistributed backups through various Protection Groups to spread the DPM load over a longer period and this seems to
have solved this problem.
In general I had lots of problems installing, configuring, and now operating DPM, so the experience has not been smooth, but most of the problems have now been solved. I find you have to "baby" this product and not push it too hard,
otherwise things start breaking.
Thanks again everyone!
DPM Error ID 30111 0x800423F4
DPM-EM Event ID 3106

Hyper-V VMs Freezing

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